PIM reserved bits and type space extension

The information below is for an old version of the document
Document Type Expired Internet-Draft (pim WG)
Authors Stig Venaas  , Alvaro Retana 
Last updated 2019-04-21 (latest revision 2018-10-18)
Replaces draft-venaas-pim-reserved-bits
Stream Internet Engineering Task Force (IETF)
Expired & archived
pdf htmlized bibtex
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Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The currently defined PIM version 2 messages share a common message header format. The common header definition contains eight reserved bits. This document specifies how these bits may be used by individual message types, and creates a registry containing the per message type usage. This document also extends the PIM type space by defining three new message types. For each of the new types, four of the previously reserved bits are used to form an extended type range. This document Updates RFC7761 and RFC3973 by defining the use of the currently Reserved field in the PIM common header. This document further updates RFC7761 and RFC3973, along with RFC5015, RFC6754 and RFC8364, by specifying the use of the currently Reserved bits for each PIM message.


Stig Venaas (stig@cisco.com)
Alvaro Retana (alvaro.retana@huawei.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)